Report Generated 04/01/2021 at 0717

Page Description

2 - Mean Daily Water Temperature, Release Flow Rates and Air Temperatures with Monthly Averages

3 - Redding 10-Day Forecasted Air Temperatures

4 - Sacramento River Mean Daily Water Temperature, Air Temperature and 10-Day Forecasted Air Temperature Plot

- Water Temperature Measuring Station Details

- Temperature Control Point Details

5 - Shasta Lake Isothermobaths & Cold Water Pool Statistics

14 - Trinity Lake Isothermobaths & Cold Water Pool Statistics

23 - Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

x - TCD Configuration (External Link)

All Data in this Report is Preliminary and Subject to Change

Northern CVP Water Temperature Report

March - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Feb 2801 238 3281 49.3 51.6

03/01 49.5 49.0 47.8 49.4 49.7 50.2 50.5 51.0 51.3 51.5 47.1 46.7 45.8 45.6 2782 77 3301 50.0 48.5 51.3

03/02 49.8 49.1 47.8 49.6 49.8 50.2 50.5 ? 51.0 51.3 51.7 47.3 46.7 45.9 45.9 2935 77 3300 54.0 49.5 52.8

03/03 49.8 49.0 47.9 49.6 49.9 50.4 50.9 51.1 51.4 51.6 47.4 46.9 45.9 45.8 3661 77 3481 53.0 51.8 55.4

03/04 49.3 49.1 48.2 49.5 49.9 50.5 51.3 51.7 52.2 52.1 47.5 47.1 46.3 46.1 3442 77 3481 51.5 51.4 53.7

03/05 49.3 48.8 47.8 49.6 50.0 50.5 51.1 51.6 52.4 52.6 47.5 47.3 46.9 46.5 3287 177 3473 51.0 51.8 56.1

03/06 49.5 48.6 47.5 49.5 50.1 50.6 51.6 52.1 52.7 52.7 47.6 47.4 48.2 47.3 3277 220 3480 49.5 49.1 50.2

03/07 49.3 48.8 47.7 49.6 50.0 50.4 51.2 51.8 52.5 52.8 47.8 47.6 47.9 47.8 3102 155 3479 50.0 48.6 49.9

03/08 49.3 48.6 48.1 49.3 49.5 49.7 50.6 51.2 51.9 52.0 47.3 47.6 47.1 46.7 3404 97 3483 47.0 47.2 48.3

03/09 49.6 48.6 47.6 49.1 49.2 49.3 49.7 49.8 50.3 50.4 46.6 47.5 45.7 45.6 2747 281 3478 47.0 44.4 46.1

03/10 49.5 48.7 48.3 48.8 48.9 49.0 49.3 49.6 50.2 49.8 46.7 47.8 45.6 45.5 3481 77 3475 43.0 41.5 43.5

03/11 49.5 48.8 47.8 48.6 49.1 49.6 49.7 49.9 50.3 50.0 47.6 47.9 47.5 46.6 3424 157 3480 48.5 45.9 49.0

03/12 49.6 49.1 47.6 48.8 49.3 49.8 50.6 51.0 51.6 51.4 48.0 47.7 47.8 47.7 2843 358 3474 56.0 52.2 55.2

03/13 49.6 49.2 48.2 49.1 49.6 50.1 51.0 51.5 52.1 52.1 48.3 47.5 47.9 47.8 2804 257 3481 50.5 48.9 51.6

03/14 49.4 48.8 48.8 49.3 49.3 49.3 50.2 50.9 51.7 51.7 ? 47.0 47.2 46.8 46.5 3143 78 3479 45.5 44.6 46.5

03/15 49.3 48.8 47.8 49.4 49.6 49.7 48.9 49.1 49.6 50.0 47.8 47.3 45.6 45.9 3187 380 3477 46.0 43.8 44.5

03/16 49.6 49.2 48.6 49.2 49.6 50.0 49.8 50.0 50.3 49.8 47.6 47.4 47.0 46.6 3262 78 3482 50.0 46.6 46.9

03/17 49.6 49.0 48.5 49.2 49.6 50.0 51.0 51.5 52.1 51.5 48.1 47.5 47.0 46.4 3173 77 3481 51.5 49.7 50.4

03/18 49.6 48.9 47.9 49.3 49.3 49.4 ? 50.3 51.0 51.9 51.8 47.8 47.8 47.2 47.2 2655 429 3484 49.0 49.3 49.9

03/19 49.2 48.7 48.0 49.4 50.1 50.6 50.8 50.9 51.3 51.3 49.3 48.0 48.1 48.0 2687 362 3486 52.5 52.2 53.3

03/20 49.2 48.7 48.0 49.5 50.0 50.6 51.8 52.3 52.8 52.6 48.3 48.0 47.9 48.0 2786 361 3483 48.0 49.3 51.8

03/21 49.8 49.1 48.5 49.5 50.0 50.6 51.8 52.5 53.1 53.2 48.7 48.1 47.7 47.6 3171 167 3529 54.0 51.0 53.0

03/22 49.7 49.1 48.6 49.7 50.3 51.0 52.6 53.2 53.9 53.7 49.6 48.5 49.2 48.5 3122 226 3529 57.0 54.8 56.2

03/23 50.2 49.6 49.1 49.7 50.2 50.7 52.1 52.8 53.5 53.6 49.1 48.5 48.9 48.8 3224 214 3532 56.0 54.4 55.8

03/24 50.0 49.3 49.5 49.9 50.3 50.8 52.0 52.6 53.2 53.2 49.0 48.6 48.5 48.5 3090 77 8539 57.0 55.5 57.2

03/25 50.0 49.5 49.0 50.3 50.7 51.2 ? 52.4 53.2 53.9 53.8 49.7 48.8 49.6 49.5 2783 213 3535 54.5 54.3 56.6

03/26 50.1 49.6 49.8 50.4 51.0 51.6 52.7 53.5 54.2 54.3 49.8 48.8 49.5 49.8 2779 77 3534 60.5 57.7 57.8

03/27 50.3 49.8 49.8 50.4 51.2 52.1 53.6 54.6 55.3 55.3 50.4 49.0 50.7 50.5 3005 77 3578 62.0 58.5 60.7

03/28 49.7 49.3 49.6 50.7 51.4 52.3 54.2 55.4 56.3 56.5 50.7 49.3 51.9 51.7 2905 77 3545 59.0 58.5 60.8

03/29 50.7 ! - 49.2 51.1 51.6 52.2 53.9 55.1 56.0 56.3 50.3 49.3 51.8 51.7 2919 207 3509 59.5 59.0 60.8

03/30 50.5 ! - 49.8 51.0 51.5 52.0 53.1 53.7 54.3 54.7 50.2 50.0 50.2 50.4 3160 77 3456 63.5 60.9 61.7

03/31 50.8 50.3 49.9 50.7 51.5 52.5 54.0 54.9 55.6 55.4 50.6 50.4 51.6 50.8 3506 77 3437 66.0 59.3 62.6

Mar 3089 172 3644 51.3 53.2

95746 5341 112961

Legend Notes 189908 10594 224054

? = 1-9 hours of data missing (Average includes estimations) 1 Temperatures are weighted averages based on individual penstock flow and temperature

! = 10 or more hours of data missing (Average not calculated) Highlighted cells in the TCD column indicate a TCD change was made on that day

# = Station out of service 2 Current Sacramento River control point (see page 4 for more details)

↑ = Record high air temperature

↓ = Record low air temperature

 = Monthly Averages

50.5

49.3

51.4

D

A

T

E

49.7 49.1

CCR2 TCD SAC 1 SHD SPP1 KWK BSF

49.7 49.1 48.5 49.7 50.1

47.1 49.2 49.4 49.6 49.6 49.9

Mean Daily 

Release (CFS)

NFH

44.2

Mean Daily Water Temperatures (°F)

45.3

Mean Daily Air 

Temperatures (°F)

RDD

51.3

Total CFS

51.9 47.8 53.0

IGO3

52.6

Total AF

49.9 46.3

RDB

52.5 48.4

LWS

48.0 48.0

DGC

44.2

JLF BND

2
↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg

03/01 45 71 58.0 34 68 51.0 37 71 54.0 37 71 54.0 38 66 52.0 41 66 53.5 42 61 51.5 39 61 50.0 38 56 47.0 41 57 49.0 39 63 51.0 43 67 55.0

03/02 34 66 50.0 35 73 54.0 37 71 54.0 38 63 50.5 39 64 51.5 43 58 50.5 38 58 48.0 37 54 45.5 41 55 48.0 39 57 48.0 39 63 51.0 40 71 55.5

03/03 34 74 54.0 33 73 53.0 37 63 50.0 42 63 52.5 40 58 49.0 37 60 48.5 38 55 46.5 39 54 46.5 41 54 47.5 40 61 50.5 40 65 52.5 42 65 53.5

03/04 33 73 53.0 40 62 51.0 39 64 51.5 39 58 48.5 36 60 48.0 38 53 45.5 37 51 44.0 35 55 45.0 40 60 50.0 40 67 53.5 42 66 54.0 44 66 55.0

03/05 38 65 51.5 38 66 52.0 40 58 49.0 37 61 49.0 37 56 46.5 39 53 46.0 35 59 47.0 35 62 48.5 43 70 56.5 44 70 57.0 45 71 58.0 46 72 59.0

03/06 35 67 51.0 44 60 52.0 36 63 49.5 37 53 45.0 38 53 45.5 37 60 48.5 35 65 50.0 37 69 53.0 42 67 54.5 47 66 56.5 42 68 55.0 42 69 55.5

03/07 40 59 49.5 39 62 50.5 38 54 46.0 38 53 45.5 38 55 46.5 35 65 50.0 36 69 52.5 39 67 53.0 42 60 51.0 36 62 49.0 38 65 51.5 40 70 55.0

03/08 37 63 50.0 45 53 49.0 39 52 45.5 38 52 45.0 33 60 46.5 36 66 51.0 36 66 51.0 38 63 50.5 45 63 54.0 45 70 57.5 44 71 57.5 46 72 59.0

03/09 40 54 47.0 40 51 45.5 39 52 45.5 34 62 48.0 35 67 51.0 36 68 52.0 38 64 51.0 35 60 47.5 41 69 55.0 46 71 58.5 46 70 58.0 46 69 57.5

03/10 39 55 47.0 38 51 44.5 31 62 46.5 35 67 51.0 34 66 50.0 39 59 49.0 36 60 48.0 36 63 49.5 39 58 48.5 42 60 51.0 43 65 54.0 42 69 55.5

03/11 38 48 43.0 35 63 49.0 38 68 53.0 36 66 51.0 39 56 47.5 36 58 47.0 35 64 49.5 37 65 51.0 41 69 55.0 44 70 57.0 46 69 57.5 44 69 56.5

03/12 34 63 48.5 43 69 56.0 36 68 52.0 40 56 48.0 39 58 48.5 36 63 49.5 37 64 50.5 43 63 53.0 46 64 55.0 45 67 56.0 44 69 56.5 43 69 56.0

03/13 42 70 56.0 36 69 52.5 39 54 46.5 35 56 45.5 32 61 46.5 35 61 48.0 42 59 50.5 44 63 53.5 49 63 56.0 43 62 52.5 42 64 53.0 42 70 56.0

03/14 34 67 50.5 41 52 46.5 36 56 46.0 31 60 45.5 35 61 48.0 42 59 50.5 44 60 52.0 41 60 50.5 40 57 48.5 41 64 52.5 47 70 58.5 47 74 60.5

03/15 41 50 45.5 38 57 47.5 34 60 47.0 33 61 47.0 42 54 48.0 42 59 50.5 36 61 48.5 36 62 49.0 40 67 53.5 47 71 59.0 45 68 56.5 45 67 56.0

03/16 37 55 46.0 43 60 51.5 33 60 46.5 45 54 49.5 41 58 49.5 35 62 48.5 35 64 49.5 39 65 52.0 46 69 57.5 45 71 58.0 47 71 59.0 46 73 59.5

03/17 42 58 50.0 43 61 52.0 45 54 49.5 41 57 49.0 37 61 49.0 36 66 51.0 39 65 52.0 38 68 53.0 47 70 58.5 47 76 61.5 50 76 63.0 48 76 62.0

03/18 43 60 51.5 47 52 49.5 43 56 49.5 35 60 47.5 36 66 51.0 39 65 52.0 40 69 54.5 42 73 57.5 44 70 57.0 46 73 59.5 47 75 61.0 47 75 61.0

03/19 46 52 49.0 51 57 54.0 37 60 48.5 36 66 51.0 39 66 52.5 40 70 55.0 43 73 58.0 43 68 55.5 47 76 61.5 50 80 65.0 50 76 63.0 45 75 60.0

03/20 46 59 52.5 37 61 49.0 36 66 51.0 40 67 53.5 40 69 54.5 41 73 57.0 43 68 55.5 42 72 57.0 45 77 61.0 49 77 63.0 49 78 63.5 47 78 62.5

03/21 35 61 48.0 42 66 54.0 41 66 53.5 40 67 53.5 40 72 56.0 41 66 53.5 41 70 55.5 41 77 59.0 45 75 60.0 50 65 57.5 46 68 57.0 42 74 58.0

03/22 40 68 54.0 47 64 55.5 39 65 52.0 39 71 55.0 42 68 55.0 41 75 58.0 42 79 60.5 44 78 61.0 49 79 64.0 51 78 64.5 52 75 63.5 50 73 61.5

03/23 47 67 57.0 46 67 56.5 41 73 57.0 42 68 55.0 41 77 59.0 42 78 60.0 44 78 61.0 45 74 59.5 50 82 66.0 50 82 66.0 52 78 65.0 51 76 63.5

03/24 46 66 56.0 47 70 58.5 41 64 52.5 40 73 56.5 42 79 60.5 44 78 61.0 44 72 58.0 41 74 57.5 50 81 65.5 50 78 64.0 49 77 63.0 47 77 62.0

03/25 45 69 57.0 48 65 56.5 42 73 57.5 44 78 61.0 45 78 61.5 45 66 55.5 40 72 56.0 43 79 61.0 49 82 65.5 48 77 62.5 47 74 60.5 45 66 55.5

03/26 44 65 54.5 49 73 61.0 44 78 61.0 46 77 61.5 44 66 55.0 41 73 57.0 44 79 61.5 45 81 63.0 48 79 63.5 47 75 61.0 43 69 56.0 45 66 55.5

03/27 46 75 60.5 50 81 65.5 45 80 62.5 43 67 55.0 42 75 58.5 45 81 63.0 46 81 63.5 46 79 62.5 48 75 61.5 47 73 60.0 42 69 55.5 44 68 56.0

03/28 46 78 62.0 43 80 61.5 42 69 55.5 43 78 60.5 44 81 62.5 45 80 62.5 46 77 61.5 46 72 59.0 48 75 61.5 40 63 51.5 38 64 51.0 42 69 55.5

03/29 42 76 59.0 50 70 60.0 45 76 60.5 45 80 62.5 46 80 63.0 47 78 62.5 47 70 58.5 45 63 54.0 45 68 56.5 40 71 55.5 42 71 56.5 45 75 60.0

03/30 49 70 59.5 NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR

03/31 51 76 63.5 59 79 60.0 45 83 64.0 47 79 63.0 47 75 61.0 46 69 57.5 47 63 55.0 44 63 53.5 43 69 56.0 47 75 61.0 48 79 63.5 49 79 64.0

Web Links Legend

10-Day Min/Max Forecast NR = Forecasted temperatures not recorded

Previous Days Min/Max Actuals 100 = Previous day actual temperatures in red and bolded indicate a record temperature for that date

Redding (RDD) Daily Air Temperatures (°F)

8 Days

D

A

T

E

Forecasted

4 Days 5 Days 6 Days

Actual

Previous Day Current Day 1 Day 2 Days 3 Days 7 Days 9 Days 10 Days

3
Code Body of Water Location1 CDEC Link River Point Temp. (°F) Begin Date End Date

TCD N/A Shasta Power Plant N/A Sacramento BSF 56 05/15/2019 09/20/2020

SHD Sacramento River 0.3 miles downstream of Shasta Power Plant Click Here Sacramento CCR 56 09/21/2020 TBD

SPP N/A Spring Creek Power Plant N/A Trinity DGC 56 09/15/2020 10/01/2020

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2020 12/31/2020

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here

BSF Sacramento River 25 miles downstream of Keswick Dam Click Here

JLF Sacramento River 34 miles downstream of Keswick Dam Click Here

BND Sacramento River 41 miles downstream of Keswick Dam Click Here

RDB Sacramento River 58 miles downstream of Keswick Dam Click Here

IGO Clear Creek 7.3 miles downstream of Whiskeytown Dam Click Here

LWS Trinity River 1.1 miles downstream of Lewiston Dam Click Here Notes

DGC Trinity River 19 miles downstream of Lewiston Dam Click Here

NFH Trinity River 38 miles downstream of Lewiston Dam Click Here 1 Distances are approximate

Station Details Water Right Temperature Control Points

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

48

49

50

51

52

53

54

55

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 03/31/2021 at 1353

Latest Profile Date: 03/31/2021

Page Description

6 - Shasta Lake Isothermobaths Plot

7 - Shasta Lake Cold Water Pool Volume ≤52°F

8 - Shasta Lake Cold Water Pool Volume ≤50°F

9 - Shasta Lake Cold Water Pool Volume ≤48°F

10 - Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

11 - Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

12 - Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

13 - Shasta Lake Cold Water Pool Comparison by Year

Shasta Lake Isothermobaths & Cold Water Pool Statistics

2021

5
6

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
7

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F

Avg (1998-2020) 2014 2015 2016 2019 2021
8

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F

Avg (1998-2020) 2014 2015 2016 2019 2021
9

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F

Avg (1998-2020) 2014 2015 2016 2019 2021
10

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
11

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
12

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
Mar-31

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

1998 1820 1714 721 1418 108 137 78 108

1999 1921 1984 1633 1846 114 159 176 149

2000 1391 1359 325 1025 83 109 35 75

2001 1351 1493 1297 1380 80 119 140 113

2002 1981 2092 948 1674 118 167 102 129

2003 1369 1169 521 1019 81 93 56 77

2004 1478 1777 416 1223 88 142 45 91

2005 1043 1038 331 804 62 83 36 60

2006 2145 2503 1623 2090 127 200 175 167

2007 1442 1676 983 1367 86 134 106 108

2008 1288 692 526 835 76 55 57 63

2009 582 783 782 716 35 63 84 60

2010 2158 1534 973 1555 128 123 105 118

2011 2231 2665 1179 2025 132 213 127 157

2012 2108 1590 567 1422 125 127 61 104

2013 1413 1457 982 1284 84 117 106 102

2014 61 -39 -88 63 4 -3 -9 5

2015 129 224 -310 221 8 18 -33 20

2016 1633 1804 286 1241 97 144 31 91

2017 2105 1449 1305 1620 125 116 140 127

2018 1195 1085 287 856 71 87 31 63

2019 2257 1648 1411 1772 134 132 152 139

2020 1911 797 201 970 113 64 22 66

2021 0 0 0 0 0 0 0 0

∆ TAF % ∆

Shasta Lake Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

13
Updated 03/25/2021 at 0839

Latest Profile Date: 03/24/2021

Page Description

15 - Trinity Lake Isothermobaths Plot

16 - Trinity Lake Cold Water Pool Volume ≤52°F

17 - Trinity Lake Cold Water Pool Volume ≤50°F

18 - Trinity Lake Cold Water Pool Volume ≤48°F

19 - Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

20 - Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

21 - Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

22 - Trinity Lake Cold Water Pool Comparison by Year

Trinity Lake Isothermobaths & Cold Water Pool Statistics

2021

14
15

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
16

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F

Avg (2000-2020) 2014 2015 2016 2019 2021
17

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F

Avg (2000-2020) 2014 2015 2016 2019 2021
18

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F

Avg (2000-2020) 2014 2015 2016 2019 2021
19

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
20

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
21

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Mar-24

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

2000 813 658 200 557 63 51 16 43

2001 372 321 248 314 29 25 19 24

2002 540 540 446 509 42 42 35 40

2003 727 703 192 541 57 55 15 42

2004 672 600 524 599 52 47 41 47

2005 443 131 -29 201 35 10 -2 16

2006 891 891 692 825 69 69 54 64

2007 599 530 284 471 47 41 22 37

2008 281 281 281 281 22 22 22 22

2009 -133 -184 -329 215 -10 -14 -26 17

2010 -2 -30 -126 53 0 -2 -10 4

2011 768 768 647 728 60 60 50 57

2012 672 627 600 633 52 49 47 49

2013 772 643 403 606 60 50 31 47

2014 -27 -39 -447 171 -2 -3 -35 13

2015 -224 -352 -443 340 -17 -27 -35 26

2016 -63 -63 -86 70 -5 -5 -7 5

2017 733 680 556 656 57 53 43 51

2018 540 489 450 493 42 38 35 38

2019 637 637 503 592 50 50 39 46

2020 674 582 200 485 52 45 16 38

2021 0 0 0 0 0 0 0 0

Trinity Cold Water Pool Comparison by Year (for Specified Date)

∆ TAF % ∆

Historic - Current (Historic - Current) / Current

22
Updated 03/25/2021 at 0845

Latest Profile Date: 03/23/2021

Page Description

24 - Whiskeytown Lake Isothermobaths Plot

25 - Whiskeytown Lake Cold Water Pool Volume ≤60°F

26 - Whiskeytown Lake Cold Water Pool Volume ≤58°F

27 - Whiskeytown Lake Cold Water Pool Volume ≤56°F

28 - Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances

29 - Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances

30 - Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances

31 - Whiskeytown Lake Cold Water Pool Comparison by Year

Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

2021

23
24

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
25

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F

Avg (2000-2020) 2014 2015 2016 2019 2021
26

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F

Avg (2000-2020) 2014 2015 2016 2019 2021
27

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F

Avg (2000-2020) 2014 2015 2016 2019 2021
28

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
29

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
30

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Mar-23

2021 ≤60° ≤58° ≤56° Abs. Avg. ≤60° ≤58° ≤56° Abs. Avg.

2000 -1 -1 -4 2 0 0 -2 1

2001 -4 -9 -7 6 -2 -4 -3 3

2002 -5 -8 5 6 -2 -4 3 3

2003 -2 -2 14 6 -1 -1 7 3

2004 -1 -9 -7 6 -1 -4 -4 3

2005 2 2 17 7 1 1 9 3

2006 -5 -5 10 7 -2 -2 5 3

2007 -3 -3 6 4 -2 -2 3 2

2008 0 0 15 5 0 0 8 3

2009 2 2 17 7 1 1 9 3

2010 3 3 19 8 2 2 10 4

2011 8 8 24 14 4 4 12 7

2012 -35 -38 -29 34 -17 -18 -15 17

2013 -6 -6 6 6 -3 -3 3 3

2014 0 0 9 3 0 0 5 2

2015 -5 -5 11 7 -2 -2 5 3

2016 29 29 40 33 14 14 20 16

2017 2 2 18 8 1 1 9 4

2018 -5 -5 10 7 -2 -2 5 3

2019 9 9 25 15 4 4 13 7

2020 0 0 0 0 0 0 0 0

∆ TAF % ∆

Whiskeytown Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

31